Dean Karnazes is one of the most iconic endurance athletes in history — and in this episode, we dive deep into the mind and body of a man who has pushed human limits further than almost anyone alive.

Dean has run 350 miles nonstop, completed 50 marathons in 50 states in 50 days, raced across deserts, glaciers and mountains, and continues to take on extreme challenges well into his 60s. But behind the world records and the headlines is a story about purpose, identity, resilience, and what it really takes to keep going when every part of you wants to stop.

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